Drill-sharpening mechanism



Oct. 6,192 5. 1,556,213

- I E. a. GARTIN DRILL SHARPENING MECHANISM Filed Dec. '7, 1923 I 49 1 v 5 9 111 10. 55 i af if 50 g 0 [71415 M 3/ a 6 2M1 x 4 Patented Oct. 6, 1925.

UNITED STATES PATENT OFFICE.

ELMER G. GARTIN, 0F GLAREMONT, NEW HAMPSHIRE, ASSIGNOB TO SULLIVAN MA- CHINERY COMPANY, A CORPORATION OF MASSACHUSETTS.

nmnn-snanrnnme MECHANISM.

Application filed December To all whom itmag/ concern:

Be it known that I, ELMER G. GARTIN, a citizen of the United States, residing at Claremont, in the county of Sullivan and State of New Hampshire, have invented certain new and useful Improvements in Drill-Sharpening Mechanisms, of which the following is a full, clear, and exact specification.

My invention relates to drill sharpening mechanisms. o i a An object of my invention is to provide animproved drill sharpener mechanism. Another object of my invention is to provide an improved drill sharpening mechanism having improved upsettin and hole opening mechanism. A still further object of my invention is to provide an improved arrangement for the fluid pressure operated upsetting andhole opening mechanisms for a drill sharpener whereby the time required in the upsetting and hole opening operation is materially decreased. These and other objects and :advantages of my improved mechanism will hereinafter more fully appear.

In the accompanying drawings I have shown for purposes of illustration one form which my invention may assume in practice.

In these drawings,, I Fig.1 1 is' a side view of an illustrative form of my 1I1V8I1t10l1, the view beingpartially in elevation and partially in section;

Fig; 2- is a detail sectional view showing a portion of the controlling mechanism.

In this illustrative form of my invention I have shown a supporting base'or'frame 1 which carries at its rear end a horizontally disposed fluid pressure percussive motor, generally designated 2. Herein, arranged adjacent the front end of the frame 1 is a fluid pressure operated vise or clamp mechanism, generally designated 3, which comprises stationary and movable cross heads 4 and 5, respectively,provided with clamping dies 6 and suitably secured within the crossheads. These crossheads are adapted to clam and center the work, herein a drill stee 8 provided with a longitudinally extending aperture 8,1in operative sharpening position. The upper or 7, 192a. Serial No. e79,2s1,.-

movable crosshead 5 is suitably raised and lowered by fluid pressure operating mechanism (not shown) in a well known manner. Herein, it will be observed that the upsetting motor 2 comprises a cylinder 9 to which fluid pressure is conducted under the control of a valve mechanism, by 10, in a well known manner, through a pipe connection 11 from any suitable source A'piston 12 is reciprocable in a of supply.-

9 and which bore 13 formed in the cylinder generally indicated I is adapted to'percussively actuate, through a t striking pin 14, a dolly 15, the latter being guided by means of a guiding block 16 carried by the frame 1. It will also be noted that the dolly 15 is resiliently held againsta distance piece 17 pivoted on the front end of the m0tor2by means of springs (not shown) in a well known manner.

-In; my improved construction it will further be observed that a hole opening mechanism, generally designated 19, of

improved form, is'suitably secured to, and in alinement with, the rear end of the cylinder 9, herein by side rods and springs (not shown) ina well known manner. Herein, this punch mechanism comprises a cylinder 20in which a piston 21 is movable under the controlofa valve mechanism 22. This piston 21 is provided with a longitudinally extending rod 23 whichextends coaxially throughthe longitudinal axes of the piston 12-, striking pin 14, and the dolly 15 and which is provided at its front end with a tapered punch 241. Herein it will further be noted that the valve mechanism-22 comprisesa casing 25 provided with a bore 26 inwhich atvalve 27 is arranged and which is provided with a tially extending grooves 28 and 29 which are adaptedto connect the conduits or pipes 30 and 31 alternatively with the fluid pressure inlet 32orby way of an exhaust passage 33. to the atmosphere, as desired. This valve is provided with an operating lever 34 which is adapted to be rocked back and forth by means of an operating rod- 35 suitably guided on the machine frame. This rod extends forwardly to a point adjacent where the operator stands during the sharpening and hole opening operation, and terminates in a ring-like grasping portion 36 plurality of circumferenwhich is adapted to be manipulated by the operator.

In the operation of my improved mechanism it will be note-d that when the drill steel 8 is heated up to the desired temperature it is inserted between the jaws of the air vise 3 and clamped rigidly therein, the crosshead 5 moving downwardly under a high pressure. Fluid pressure is then admitted to the motor 2 thereby causing the piston 12 to reciprocate at a high speed, striking the pin 14 which transmits the blow to the dolly 15 which acts on the end of the drill steel 8, upsetting the same in the desired shape. This operation tends to hammer the heated metal into the opening 8, frequently closing or obstructing the same. After the upsetting operation is completed and before the temperature of the steel has sufiiciently lowered to prevent the ready working of the same, the operator manipulates the rod 35 rotating the valve 27 and connecting the rear end of the cylinder 20 with the fluid pressure supply and simultaneously venting the forward end of the cylinder toatmosphere, thereby causing the piston 21 and consequently. the punch 24 to move forward under pressure forcing the obstructing metal from the hole. By throwing the valve in the opposite direction the piston is fed rearwardly pulling the punch from the steel.

As a result of my improvement it will be noted that I have provided a hole opening punch or pinning mechanism of an exceed, ingly simple, rugged, and compact character which may be used in conjunction with the upsetting motor of a drill sharpening mechanism and whereby the drill steel may be upsetand the hole in the steel opened with but one heating of the steel. It will furtherbe noted that a hole opening punch arranged in alinement with the upsetting motor is provided which may be operated independently of the upsetting motorand controlled at the forward end of the machine adjacent the vise and motor control levers and that the hole in the drill steel may be opened after the upsetting operation without releasing the steel from clampingmechanism. These and other advantages of my invention will be clearly apparent to those skilled in the art.

IVhile I have in thisapplication specifically described one form which my invention mayassume in practice, it willbe understood that this form of the same is shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

hat I claim as new and desire to secure by I letters Patent is:

1. In a drill sharpening mechanism, an

upsetting mechanism, and a separate holeopening mechanism arranged in alinement therewith.

2. In a drill sharpening mechanism, a percussive upsetting mechanism, and a sep arate fluid pressure operated hole-opening mechanism arranged in alinement therewith.

3. In a drill sharpening mechanism, an upsetting mechanism, and a hole-opening mechanism arranged in the rear of and in alinement therewith.

4. In a drill sharpening mechanism, an upsetting mechanism, a dolly operated on thereby, and a separate hole-opening mechanism in alinement with said dolly.

In a drill sharpening mechanism, an upsetting mechanism, and a hole-opening mechanism arranged in alinement therewith and including a punch extending thereth rough.

'6. In a drill sharpening mechanism, an upsetting motor, a dolly operated on thereby, and a hole-opening mechanism arranged in alinement therewith and including a longitudinally extending punch eX- tending freely through the axis of said dolly.

7. In a drill sharpening mechanism, an upsetting motor, a dolly operated on there by, and a hole-opening motor including a punch extending through said motor and dolly.

8. In. a drill sharpening mechanism, an upsetting motor including a piston reciprocable therein, a dolly percussively actuated by said piston, and a hole-opening mechanism arranged in alinement with said motor and including a punch extending longitudinally through the axes of said piston and dolly.

9. In a drill sharpening mechanism, a vise adapted to clamp the work in position, a horizontal motor adapted to operate on said work, and an independently operable hole-opening mechanism arranged in alinement with said motor.

10. In a drill sharpening mechanism, an upsetting motor, andan independently operable holeopening motor including a punch arranged coaxially with said upsetting motor.

11. The combination with a drill sharpening mechanism, of a plurality ofseparate alined motors adapted to act on a hollow drill steel.

12. In a drill sharpening mechanism, an upsetting motor including a hammer piston reciprocable therein adapted to act on a dolly, and a hole-opening motor arranged coaxiallv with said upsetting motor.

13. The combination with a drill sharpening mechanism, of a plurality of separate motors including al'ined pistons adapted to act on a hollow drill steel.

14. The combination with a drill sharpening mechanism, of a plurality of 'alined motors adapted to independently or simultaneously act on a hollow drill steel.

15. In a drill sharpening mechanism, a vise adapted to clamp a hollow drill steel in upsetting position, and a, plurality of separate motors adapted to act on a hollow drill steel While clamped in said vise.

16. In a drill sharpening mechanism, a vise adapted to clamp a hollow drill steel in upsetting position, an upsetting motor, and 10 a hole-opening motor alined with said upsetting motor.

In testimony whereof I afiix my signature.

ELMER G. GARTIN. 

